Checking Basic Settings Of Carburettor - Reely Rex-X Promo Ii Rtr Bedienungsanleitung

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4.7
Fine tuning of idle speed and full throttle can only be carried out with a well run in engine
T
HROTTLE STOP SCREW
The throttle stop screw is the small screw next to the idle speed-
mix adjusting screw. It is already pre-adjusted;
a readjustment should not be necessary. The idle speed adjus-
ting screw regulates the position of the slide carburettor (the
choke limit stop) and therewith the carburettor outlet in idle
speed. We recommend a carburettor outlet of approximately 1 mm.
Turning the adjusting screw clockwise widens the outlet, turning it
anticlockwise causes the
slide to retract further, which reduces the opening.
M
AIN NOZZLE NEEDLE
The main nozzle needle is located above the fuel supply to the carburettor. It is
adjusted for the first start of the engine and should not be modified yet.
The main nozzle needle regulates the air / fuel mix by full throttle. Turn
the screw clockwise in order to make the mix "leaner" (to reduce the proportion
of fuel) and turn it anticlockwise in order to make the mix "richer".
In the basic setting for the first start, the main nozzle needle must be comple-
tely screwed in then unscrewed by two to three rotations.
I -
DLE SPEED
The idle speed mix adjusting screw is the little screw on the side of carburettor linkage.
It is adjusted for the first start and should not be modified yet.
The idle speed mix adjusting screw regulates the air /fuel mix in idle speed and in the transition interval to full
throttle. Turn the screw clockwise in order to make the mix "leaner" (to reduce the proportion of fuel) and anticlockwise, if
the mix should be "richer".
Depending on fuel, glow plug used and environmental conditions, small modifications in the settings might be necessary at
a later time.
In order to reset the factory setting proceed as follows:
- Open the slide carburettor completely
- Keep the slide open and turn the idle speed mix adjusting screw clockwise as far as it will go.
- Now unscrew it turning it by 7.5 rotations anticlockwise.
C
OMBUSTION ENGINE
However, small manufacturing tolerances cannot be avoided, just as little as slight unevenness and roughness of the mate-
rial. In addition, there are deformations due to thermal and mechanical stress.
Thus, when driving the new engine, a certain break-in time must be observed.
During the break-in time, engine parts tune to one another, whereby maximal capacity is reached and premature
wear is avoided.
Thus, the break-in procedure must be carried out with the highest accuracy!
© REELY 09/07
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REPARATION
C
HECK CARBURETTOR BASIC SETTINGS
( -
IDLE SPEED ADJUSTING SCREW
(
MIX ADJUSTING SCREW
MIX ADJUSTING SCREW
The engine of Buggy chassis Rex-X Promo II is equipped with an ABC assembly.
ABC means "Aluminum", "Brass" and "Chrome".
Aluminum with its relatively small thermal expansion and small weight serves as mate-
rial for the piston. The light piston allows high revolutions and quick load-cycle changes
through the small mass inertia. The cylinder is made of brass with chrome-plated con-
tact surface and has a slightly conical shape which narrows upwards (in the range from
1 – 2 micrometer). During operation, the upper part of the cylinder heats via the glow
plug and the combustion procedures; it expands, thus giving the cylinder sleeve its
exact cylindrical shape for the optimal tuning of the piston. In this way, piston rings are
preserved, which reduces frictional loss to a minimum and excludes leakages. These
engines are manufactured according to high technical outlays with precision machining.
manuals search engine
)
Main nozzle
Throttle stop screw
)
Air suction opening
needle
Idle speed mix-
adjusting screw
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